JPS62170453A - Shape memory alloy - Google Patents
Shape memory alloyInfo
- Publication number
- JPS62170453A JPS62170453A JP1145886A JP1145886A JPS62170453A JP S62170453 A JPS62170453 A JP S62170453A JP 1145886 A JP1145886 A JP 1145886A JP 1145886 A JP1145886 A JP 1145886A JP S62170453 A JPS62170453 A JP S62170453A
- Authority
- JP
- Japan
- Prior art keywords
- shape memory
- temperature
- alloy
- ingot
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims description 12
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 239000000956 alloy Substances 0.000 abstract description 11
- 230000003446 memory effect Effects 0.000 abstract description 8
- 238000000137 annealing Methods 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229910052697 platinum Inorganic materials 0.000 abstract description 2
- 238000005097 cold rolling Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000013078 crystal Substances 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910001260 Pt alloy Inorganic materials 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000003353 gold alloy Substances 0.000 description 1
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000012567 medical material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、形状記憶合金に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to shape memory alloys.
（従来技術とその問題点）
金属が元の形を記憶しており、これを低温で変形させ、
これを加熱すると元の形に戻る形状記憶現象を示す合金
が近年開発されてきている。(Prior art and its problems) Metal remembers its original shape, and by deforming it at low temperatures,
In recent years, alloys have been developed that exhibit a shape memory phenomenon in which they return to their original shape when heated.
これらの合金で実用に供されているものはＮｉ−Ｔｉと
銅基合金で、各種の配管の継手、温度の窓の開閉等の温
度によって作動する機械部品、歯列矯正用ワイヤー等の
医療材料として利用されている。These alloys that are in practical use are Ni-Ti and copper-based alloys, which are used in various piping joints, mechanical parts that operate depending on temperature such as opening and closing temperature windows, and medical materials such as orthodontic wires. It is used as.
しかし、これらの合金の殆んどは、結晶格子の中で特定
の原子が規則的に配列した金属間化合物であるために、
鍛造、圧延、線引き等の加工が困難であること、及び特
定の原子の規則化の熱処理が必要であること等の欠点が
ある。However, since most of these alloys are intermetallic compounds in which specific atoms are regularly arranged in the crystal lattice,
It has drawbacks such as difficulty in processing such as forging, rolling, and wire drawing, and the need for heat treatment to regularize specific atoms.
（発明の目的）
本発明は、上記欠点を解消せんとするもので、加工性が
良好で、しかも原子が不規則な配列状態で良好な形状記
憶効果を示す合金を提供することを目的とするものであ
る。(Objective of the Invention) The present invention aims to eliminate the above-mentioned drawbacks, and aims to provide an alloy that has good workability and also exhibits a good shape memory effect when atoms are arranged in an irregularly arranged state. It is something.
（発明の構成）
形状記憶現象は、合金を高温から冷却した際に急激に結
晶構造が変わり始める温度、即ちＭＳ温度及び低温から
加熱した際に結晶構造が元に戻り始める温度、即ちＡｓ
温度と、Ｍｓ湯温度Ａｓ温度の温度差、高温和と低温和
、即ちマルテンサイト相の結晶構造、これらの相の加工
による変形挙動、加工によるＭｓ湯温度Ａｓ温度の変化
、及び高温和と低温和以外の析出相の有無等に密接な関
連がある。(Structure of the Invention) The shape memory phenomenon is caused by the temperature at which the crystal structure of an alloy starts to change rapidly when it is cooled from a high temperature, that is, the MS temperature, and the temperature at which the crystal structure starts to return to its original state when it is heated from a low temperature, that is, As
The temperature difference between the temperature and the Ms hot water temperature As temperature, the high sum and low sum sum, that is, the crystal structure of the martensitic phase, the deformation behavior of these phases due to processing, the change in the Ms hot water temperature As temperature due to processing, and the high sum and low sum There is a close relationship with the presence or absence of precipitated phases other than the sum.
本発明者は、ｐｔ金合金マルテンサイト相の結晶構造に
ついて研究した処、原子の配列を規則化処理したＦ ｅ
−２４，９ａｔ％ｐｔ合金が、形状記憶効果のあること
を明らかにした。この形状記憶効果はＸ線回折の結果よ
り規則度が高い場合ｆｃｃ−＝ｆｃｔ熱弾性型マルテン
サイト変態によるものであることを明らかにした。The present inventor conducted research on the crystal structure of the martensitic phase of a pt gold alloy, and found that F e
It was revealed that -24,9 at% pt alloy has a shape memory effect. The results of X-ray diffraction revealed that this shape memory effect is due to fcc-=fct thermoelastic martensitic transformation when the degree of order is high.
本発明は、上記Ｆｅ−Ｐｔ合金について、さらに研究を
進めた結果、原子の配列が不規則でも形状記憶効果のあ
る合金を見い出した。As a result of further research into the Fe--Pt alloy, the present invention discovered an alloy that has a shape memory effect even when the atoms are arranged irregularly.
本発明の形状記憶合金は、Ｆｅに、２５〜３０ａ ｔ％
のＰｔを含有させたものから成るものである。The shape memory alloy of the present invention contains 25 to 30 at% of Fe.
It is made of Pt containing Pt.
本発明の形状記憶合金に於いて、Ｆｅに２５〜３０ａｔ
％のｐｔを含有させる理由は、２５ａ ｔ％未満では溶
解鋳造時、ｆｃｃ−＋ｂｃｃへの変態が一部起こり、変
態により体積変化が大きいためインゴットが割れ、また
このインゴットを冷間圧延するのが難しく、加工性が悪
いからであり、３０ａ ｔ％を超えると、Ｍｓ温度が液
体窒素温度（７７Ｋ）以下になってしまい、実用上形状
記憶効果を利用することが難しいからである。In the shape memory alloy of the present invention, 25 to 30 at
The reason why PT is contained is that if it is less than 25at%, some transformation to fcc-+bcc will occur during melting and casting, and the volume change will be large due to the transformation, which will cause the ingot to crack, and it will be difficult to cold-roll this ingot. This is because it is difficult and has poor workability, and if it exceeds 30 at%, the Ms temperature will drop below the liquid nitrogen temperature (77K), making it difficult to utilize the shape memory effect in practice.
（実施例）
本発明の形状記憶合金の一実施例について説明する。Ｆ
ｅと２６．４ａｔ％Ｐｔとを溶解して合金となし、次に
これを鋳造して縦ｌＯ龍、横２０＋ｎ、長さ５０龍のイ
ンゴットを作り、次いでこのインゴットを冷間圧延と８
００℃の中間焼鈍を３回繰り返して幅２０龍、長さ１０
００ｍｍ、厚さ０．１■１の帯状板を作り然る後８００
〜９００℃で熱処理して最終歪みとりを行った。この帯
状板は最終歪みとりの際の形状を記憶していて、原子の
配列は不規則状態である。(Example) An example of the shape memory alloy of the present invention will be described. F
E and 26.4 at% Pt are melted to form an alloy, which is then cast to make an ingot with a length of 10 mm, a width of 20 + n, and a length of 50 mm, and then this ingot is cold rolled and
Intermediate annealing at 00°C was repeated three times to obtain a width of 20 mm and a length of 10 mm.
After making a strip plate of 0.00mm and thickness of 0.1cm, 800
Final distortion was removed by heat treatment at ~900°C. This band-shaped plate remembers its shape at the time of final strain relief, and the atoms are arranged in an irregular state.
この形状記憶合金の帯状板は、第１図ａに示す形状であ
るが、液体窒素温度（７７Ｋ）で第１図すに示す如く変
形し、温度が上昇するに従って第１図Ｃに示す如く次第
に元の形状に戻っていき、室温になると第１図ｄに示す
如く完全に元の形状に復する。This shape memory alloy strip plate has the shape shown in Figure 1a, but it deforms as shown in Figure 1C at liquid nitrogen temperature (77K), and as the temperature rises, it gradually deforms as shown in Figure 1C. It returns to its original shape, and when it reaches room temperature, it completely returns to its original shape as shown in FIG. 1d.
第２図ａ、ｂ、ｃに上記帯状板のＦ ｅ −２６，４ａ
ｔ％ｐｔ合金のＸ線回折ピークを示す。第２図ａに示す
如く室温での（２２０）ピークが、温度を１９１Ｋに下
げると、第２図すに示す如く広がり、さらに温度を液体
窒素温度（７７Ｋ）に下げると、第２図Ｃに示す如く広
がるがピークの分離は不明確である。Fig. 2 a, b, and c show the above strip plate F e -26,4a.
X-ray diffraction peaks of t%pt alloy are shown. As shown in Figure 2a, the (220) peak at room temperature spreads as shown in Figure 2 when the temperature is lowered to 191K, and when the temperature is further lowered to the liquid nitrogen temperature (77K), it appears in Figure 2C. Although the peaks are spread as shown, the separation of the peaks is unclear.
しかしながらこれは本発明者が既にＦ ｅ ２４．９
ａｔ％ｐｔにおいて明らかにしたｆｃｃ→ｆｃＬ変態と
同様な格子変形が生じたことを示している。従って、本
発明の形状記憶合金の形状記憶作用はＦＣＣ−ｆｃｔ変
態に基づくものと言える。However, the inventor has already determined that F e 24.9
This indicates that a lattice deformation similar to the fcc→fcL transformation revealed in at%pt occurred. Therefore, it can be said that the shape memory effect of the shape memory alloy of the present invention is based on FCC-fct transformation.
（発明の効果）
以上の説明で判るように本発明の形状記憶合金は、原子
が不規則な配列状態であっても、良好な形状記憶効果を
示すので、原子の配列を規則化するための熱処理が全く
不要である。また溶解鋳造した際インゴット割れること
がなく、またインゴットを冷間圧延した際、甚だ加工性
が良く、しかも加工途中の中間焼鈍の回数が半減する等
の効果がある。(Effects of the Invention) As can be seen from the above explanation, the shape memory alloy of the present invention exhibits a good shape memory effect even when the atoms are irregularly arranged. No heat treatment is required. Furthermore, the ingot does not crack when melted and cast, and when the ingot is cold rolled, it has excellent workability, and the number of intermediate annealing steps during processing is halved.
第１図ａば本発明の形状記憶合金の室温状態の形状を示
す写真、第１図すは液体窒素温度（７７Ｋ）での変形状
態を示す写真、第１図Ｃは温度が上昇して元の形に戻る
状態を示す写真、第１図ｄは完全に元の形状に戻った状
態を示す写真、第２図ａ、ｂ、Ｃは夫々室温、低温、極
低温での本発明の形状記憶合金のＸ線回折線ピークを示
す図である。
出願人 田中貴金属工業株式会社
図面の浄Ｄ（内容に変更なし）
第１図
（ｄ−）□
第２図
（Ｑ） （ｂ） 忙）手続補正古
（方式）
％式％
１、事件の表示
昭和６１年特許廓第１１４５８号
２、発明の名称
形状記憶合金
３、補正をする者
昭和６１年３月２５日
５、補正の対象 図面の第１図
６、補正の内容
図面の第１図を別紙添付の図面に補正する。Figure 1a is a photograph showing the shape of the shape memory alloy of the present invention at room temperature, Figure 1 is a photograph showing the deformation state at liquid nitrogen temperature (77K), and Figure 1C is a photograph showing the shape of the shape memory alloy of the present invention at room temperature. Figure 1 (d) is a photograph showing the state in which the shape has completely returned to its original shape, Figure 2 (a), b, and (C) are the shape memory of the present invention at room temperature, low temperature, and cryogenic temperature, respectively. It is a figure showing the X-ray diffraction line peak of an alloy. Applicant: Tanaka Kikinzoku Kogyo Co., Ltd.Drawing D (no change in content) Figure 1 (d-) □ Figure 2 (Q) (b) Busy) Procedural amendment old (method) % formula % 1. Indication of incident Patent Office No. 11458 of 1985 2 Name of the invention Shape memory alloy 3 Person making the amendment March 25, 1985 5 Subject of the amendment Figure 1 of the drawing 6 Details of the amendment Figure 1 of the drawing The amendments will be made to the attached drawings.
Claims (1)
成る形状記憶合金。A shape memory alloy made of Fe containing 25 to 30 at% of Pt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1145886A JPS62170453A (en) | 1986-01-22 | 1986-01-22 | Shape memory alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1145886A JPS62170453A (en) | 1986-01-22 | 1986-01-22 | Shape memory alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62170453A true JPS62170453A (en) | 1987-07-27 |
Family
ID=11778650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1145886A Pending JPS62170453A (en) | 1986-01-22 | 1986-01-22 | Shape memory alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62170453A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999049092A1 (en) * | 1998-03-25 | 1999-09-30 | Kanto Special Steel Works Ltd. | Iron-based magnetic shape memory alloy and method of preparing the same |
| WO2001064966A1 (en) * | 2000-02-29 | 2001-09-07 | Japan Science And Technology Corporation | Supermagnetostrictive alloy and method for preparation thereof |
| EP1724365A2 (en) * | 2004-10-12 | 2006-11-22 | Heraeus, Inc. | Low oxygen content compositions |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51125623A (en) * | 1974-07-05 | 1976-11-02 | Univ Osaka | Process for porducing and using beta-plus type electronic compound alloy and fe base solid solution alloy with memory |
| JPS5763655A (en) * | 1981-05-29 | 1982-04-17 | Univ Osaka | Beta-plus type electron compound alloy and solid solution iron alloy having property of repeatedly memorizing form, their manufacture and using method for them |
-
1986
- 1986-01-22 JP JP1145886A patent/JPS62170453A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51125623A (en) * | 1974-07-05 | 1976-11-02 | Univ Osaka | Process for porducing and using beta-plus type electronic compound alloy and fe base solid solution alloy with memory |
| JPS5763655A (en) * | 1981-05-29 | 1982-04-17 | Univ Osaka | Beta-plus type electron compound alloy and solid solution iron alloy having property of repeatedly memorizing form, their manufacture and using method for them |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999049092A1 (en) * | 1998-03-25 | 1999-09-30 | Kanto Special Steel Works Ltd. | Iron-based magnetic shape memory alloy and method of preparing the same |
| WO2001064966A1 (en) * | 2000-02-29 | 2001-09-07 | Japan Science And Technology Corporation | Supermagnetostrictive alloy and method for preparation thereof |
| US6800143B1 (en) | 2000-02-29 | 2004-10-05 | Japan Science And Technology Agency | Supermagnetostrictive alloy and method of preparation thereof |
| EP1724365A2 (en) * | 2004-10-12 | 2006-11-22 | Heraeus, Inc. | Low oxygen content compositions |
| EP1724365A3 (en) * | 2004-10-12 | 2010-02-17 | Heraeus, Inc. | Low oxygen content compositions |
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